From: Stefan Herbrechtsmeier <stefan.herbrechtsme...@weidmueller.com>
Probe the driver before use to ensure that the global data are valid.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsme...@weidmueller.com>
---
drivers/firmware/firmware-zynqmp.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/firmware/firmware-zynqmp.c
b/drivers/firmware/firmware-zynqmp.c
index 341d7cf135..64b0873ed0 100644
--- a/drivers/firmware/firmware-zynqmp.c
+++ b/drivers/firmware/firmware-zynqmp.c
@@ -281,6 +281,20 @@ U_BOOT_DRIVER(zynqmp_power) = {
};
#endif
+static int __maybe_unused do_pm_probe(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ ret = uclass_get_device_by_driver(UCLASS_FIRMWARE,
+ DM_DRIVER_GET(zynqmp_power),
+ &dev);
+ if (ret)
+ debug("%s: Probing device failed: %d\n", __func__, ret);
+
+ return ret;
+}
+
int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
u32 arg3, u32 *ret_payload)
{
@@ -296,6 +310,10 @@ int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0,
u32 arg1, u32 arg2,
u32 regs[] = {api_id, arg0, arg1, arg2, arg3};
int ret;
+ ret = do_pm_probe();
+ if (ret)
+ return ret;
+
if (api_id == PM_FPGA_LOAD) {
/* Swap addr_hi/low because of incompatibility */
u32 temp = regs[1];
--
2.30.2
